模態阻尼 的英文怎麼說
中文拼音 [mótàizǔní]
模態阻尼
英文
m-
Adaptive modal damping control experiment for piezoelectric structures
壓電結構的自適應模態阻尼控制實驗Mode is structure ’ s inherence characteristics, each mode has specifically resonant frequencies, damping values, mode shapes, mode stiffness and mode mass
模態是結構的固有振動特性，每一階模態都具有特定的固有頻率、阻尼比、振型、模態剛度和模態質量。The result of optimization and analysis show : 1 ) across - axis sensitivity is smaller, less than 2 % of the primary axis sensitivity ; 2 ) the first mode is dominant at primary axis, which reduce intersectional coupling ; 3 ) when damp ratio is between 0. 3 and 0. 7, accelerometer has better dynamic characteristic
分析結果表明此種結構的具有： 1 ）橫向靈敏度小， x 、 z方向的橫向靈敏度均不到敏感方向的2 ； 2 ）在敏感方向上，一階模態起主導作用，其它模態的影響較小，有利於減小交叉耦合的影響； 3 ）當阻尼比毛為0 . 3 ? 0 . 7時，傳感器具有較好的動態特性。The use of the free undamped normal modes is seen to ensure that the linear and angular momenta of the distortional motion vanish.
看來採用自由無阻尼正規模態可保證變形運動的線動量和角動量為零。Undamped natural mode of vibration
無阻尼固有振動模態A 2dof vehicle structure model with mr damper is established, a sliding model controller is designed, and the real - time control damping force of suspension system is educed
摘要建立了履帶車輛1 / 2車體振動模型，設計了相應的滑移面和滑移模態控制器，得出了履帶車輛半主動懸掛系統的實時控制阻尼力，並對路面激勵下滑模控制與最優控制的減振效果進行了模擬。The relationships of modal damping versus the stiffness of cables, the attachment height of damper and damping constant are obtained. with the optimal structural control method, a new approach to determine the optimal damping constant of viscous damper is presented. the first a few modal damping can be optimized simultaneously under the optimal damping constant of damper, which is more convenient than the existed design method
4 、對拉索-粘性阻尼器系統的動力特性進行了研究，得到了拉索剛度、阻尼器安裝高度及阻尼系數等參數對拉索系統模態阻尼比的影響規律；根據最優控制原理，提出了一種確定阻尼器優化阻尼系數的方法，該方法確定的阻尼系數能保摘要證前幾階模態阻尼比得到整體優化，改進了現有的設計方法。Through studying the working mechanism of the composing, the paper referred the bearing ' s analyzing model and designing flow. through shearing test of high damping rubber, the paper analyzes the influence of shearing shape, shearing strain range and inspiriting frequence on the characteristic parameters ( dynamic shear elastic module, dissipation engineering module, wasted gene ). according to the rule of equivalent energy, the paper gets the hysteretic curve of hdr ' s equivalent bilinear model and parameters ' calculating formula
本論文通過對這種分離式減震支座各組成部分工作機理的研究，提出了該分離式減震支座整體的計算分析方法和設計流程；通過高阻尼橡膠剪切試驗，分析了高阻尼橡膠剪切面形狀、剪應變幅值、激勵頻率和試件高度對特徵參數（動態剪切彈性模量、耗能模量、損耗因子）的影響。The calculated drafts covers the whole possible ship draft in the large amplitude motion ; secondly, the research creates and solves the ship large amplitude motion equations. on the one hand, the actual calculation takes into account the coupling between the different motion modes, on the other hand, in the process of calculation of the ship hydrodynamic coefficient, it considers the influence of the nonlinear factor. the hydrodynamic coefficient used in the calculation of froude - krylov force, diffraction force and radiation force changes instantaneously following the draft, and the hydrostatic buoyancy is computed very accurately for the instantaneous immerse hull
本文的研究分為二個部分：首先利用frank源匯法計算水動力系數，計算包括不同吃水時的附加質量和阻尼系數，吃水范圍涵蓋了船舶大幅度運動時所有可能的吃水；然後建立和求解船舶大幅度運動方程，在實際計算時一方面考慮了運動模態之間的耦合，另一方面在計算水動力時，考慮了非線性因素的影響。 froude - krylov力、輻射力、繞射力中的水動力系數隨吃水瞬時變化，靜浮力的計算精確到船體瞬時濕表面積，最後用四階龍格?庫塔方法在時域內求解船舶運動方程，並進行了載荷計算。The predigested calculating model about lunar soft - landing damping system is established in the course of landing shock. the dynamic computer simulation model is established according to the structure parameters
建立了磁流變阻尼器緩沖系統沖擊時的簡化模型，利用本文建立的動力學方程和所用阻尼器結構參數構建了動態模擬模型，並進行了計算機模擬。According to the working modes of mr devices, combining the ohm ' s law of magnetic circuit and the design theory of non - steady magnetic circuit, magnetic structures of the automotive damper have been worked out. to emulate the performance of conventional shock absorber, two automotive mr dampers were designed and fabricated at chongqing university. an applied magnetic field increase the yield stress of mr fluids in flow annular passages, which alters the velocity profile of mr fluid in the passages and raise the pressure gradient between low cavity and high one at some given flow rates
根據磁流變阻尼器工作模式，利用磁路中的歐姆定律和動態磁路設計原理，結合汽車懸架的技術要求和結構特點，提出了基於剪切模式和流動模式共同作用（混合工作模式）的汽車磁流變阻尼器設計原理，討論了阻尼器動態磁路設計中的若干技術問題；根據流體力學navier - stokes方程，分別利用newton流體特性和bingham流體特性，推導了基於平板模型和軸對稱模型的流變學方程，得出了阻尼器阻尼力的計算方法。The research results show that transducer partially debonding results in clear change of instantaneous frequencies, mode frequencies and damping ratio of the structures
研究結果表明，傳感器局部開膠對結構的瞬時頻率和模態頻率以及阻尼比均有明顯的影響。The simulations get the variation curve of the torque acted on the helical gear spline during translating process, and get the important damping force acted on the middle part during engaging and disengaging process
模擬還求得了作用在螺旋齒花鍵上的扭矩在動態過程中的變化曲線；求得了作用在中間件上，起關鍵作用的阻尼力在嚙合、脫開中的動態變化曲線。Through the deep study of f. d. demello dynamic model of electromechanical transition and synchronous generator theory, we proposed a new control strategy of excitation device that can eliminate the negative - damping phenomenon, which is directly against the cause of producing negative - damping represented as low frequency oscillation in the system
通過深入研究f . d . demello機電暫態的動力學模型以及同步發電機理論，針對系統產生負阻尼即低頻振蕩的原因，我們提出了一種新的可消除負阻尼現象的勵磁控制策略。Analysis software. the analysis show : the gyroscope effect to the flywheel rotor ' s and the shaft ' s vibration character under high rotate speed should be considered. at this time, the system ' s normal frequency is the function of rotate speed ; the amplitude passing through the resonance field can be lowered obviously by improving the effective damping of the electro - magnetic bearing
建立了高速旋轉狀態下，採用磁軸承作支撐的飛輪轉子和轉軸的動力學模型，給出了有限元法在此問題中的具體應用，並利用i - deas有限元分析軟體具體分析了飛輪系統的共振頻率、系統振型，以及對偏心激勵的響應，分析表明：對于高速旋轉的飛輪轉子和轉軸，應考慮陀螺效應對其動力學特性的影響，此時系統的固有頻率是轉速的函數；通過提高磁軸承的等效阻尼可顯著降低系統通過共振區域時的振幅。For obtaining a quasi - static equilibrium state at the end of the pre - simulation, the incorporation of sufficient system damping is a necessity ( see theory manual, chapter airbag models )
為了在預模擬結束的時候達到準靜態平衡狀態，需要足夠的系統阻尼（見理論手冊，氣囊模型章節） 。As to the polyreference implemention of the least - squares complex frequency - domain estimator in mathematical separation technique of modes, this thesis builds a right matrix - fraction description model to estimate the system poles. then frequency point stabilization diagram is set up and analyzed to automatically determine natural frequencies, modal damping ratios and modal participation factors. finally mode shapes are identified based on the least squares theory
對于模態數學分離技術的多參考點最小二乘復頻域識別技術，先建立右矩陣分式頻響模型，識別出系統極點，再通過建立和分析頻率點穩態圖，能自動的確定出結構的固有頻率、模態阻尼比和模態參與因子，最後根據最小二乘原理識別出模態振型向量。The research of approach to monitor bridge health state has become a hot spot which social and technologic people have explored through the theory of, dynamics of structures and the lest technology. structure mode parameters ( vibration frequency, mode of vibration and damping ) are the functions of physical property parameters ( mass, rigidity, damping ). the damage of structures certainly leads to the transformation of physical property parameters
結構模態參數（振動頻率、振型和模態阻尼等）是結構物理特性參數（質量、剛度、阻尼）的函數，結構損傷必然導致結構物理特性的變化，即結構參數發生改變，利用現代的測試技術準確地測出這些參數變化，就可對橋梁損傷狀況進行評估，應變模態方法識別橋梁損傷就是基於這種理論提出的，本文所做的主要工作為： 1The inherent frequency, mode, damp ratio and impact coefficient of the bridge were achieved by comparing the actual test results with the calculation results
將實橋測試結果和計算分析結果進行了比較，並且獲得了大橋的固有頻率、模態、阻尼比和沖擊系數。After deriving the governing equation of motion of these dampers and the theoretical model, we simulated the damping force of the dampers under different electric field strength conditions, and used an electrical hydraulic servo dynamic testing system to test flow mode er damper and mixed mode er damper
在不同電場下，模擬阻尼器的阻尼力特性，並使用電液伺服動態測試系統測試流動模式電流變液阻尼器及混合模式電流變液阻尼器。分享友人